FFU air volume requirements have not yet been determined. How to use process input to form a selection range?
Undetermined air volume does not mean that selection cannot be made
In the early stages of a project, the air volume requirements of the FFU are sometimes not fully determined. The process layout may still be adjusted, the number of equipment has not been determined, and the cleanliness level requirements may still be discussed. If you purchase FFU directly at this time, the selection may be biased due to uncertainty in air volume.
However, the air volume is not determined, which does not mean that the selection work cannot be carried out. The selection range can be sorted out through process input. For example, first confirm the protection area, airflow pattern, pollution load and installation conditions, and then estimate the air volume range. This can narrow down the candidate options and prepare for subsequent detailed selection.
The selection range is not the final air volume, but a verifiable range. Within this interval, the adaptability of different FFU configurations can be evaluated. Aili Industrial has complete production capabilities in terms of FFU complete machines and selection, and can coordinate the selection range with input from the early stage of the project. For the basic structure of the FFU machine, please refer toAili Industrial FFU fan filter unit。
How to input the protective area and airflow pattern
The protected area is the basis for air volume estimation. It is necessary to clarify which areas need to be protected, whether it is the entire clean room or partial workstations. The protected area can be determined based on room area or critical area area.
The airflow pattern affects the air volume calculation method. Unidirectional flow areas are usually calculated based on the protected area and target wind speed, while non-unidirectional flow areas are usually calculated based on the number of air changes. Mixed flow areas require zoning.
After the protection area and airflow pattern are clear, the air volume range can be initially estimated. If the airflow pattern has not been determined, you can first estimate it in two ways and compare the results.
How to enter pollution load and cleanliness level
Pollution load and cleanliness level affect the required air volume. Pollution loads include personnel numbers, equipment dust generation, material handling and process emissions. The higher the cleanliness level requirement, the larger the air volume or the higher number of air changes usually required.
If the pollution load and cleanliness level have been determined, they can be directly used for air volume estimation. If it is not clear yet, you can refer to similar projects or process requirements to form preliminary input.
For key areas, you can estimate according to higher requirements and reserve a certain margin. For auxiliary areas, lower requirements can be estimated. This creates an air volume range rather than a single value.
How installation conditions affect selection
Installation conditions affect FFU structure selection. Ceiling height, mezzanine space, installation method, maintenance access and electrical conditions all influence selection. If space is limited, an ultra-slim FFU or a drop-down FFU may be required. If the device is matched, EFU may be required.
The installation conditions can be sorted out in the early stage to form structural constraints. Structural constraints, together with air volume ranges, form the selection input.
For device-side matching, you can refer toEquipment end fan filter unit andCustomize the EFU equipment-side fan filter unit to understand the different structures. For projects with limited space, you can refer toUltra-thin FFU and70mm ultra-thin EFU。
How to form the selection range
After sorting out the protection area, air flow pattern, pollution load, cleanliness level and installation conditions, a selection range can be formed. The selection range can include air volume range, static pressure requirements, filter efficiency level, structural form and control method.
The selection range is not a fixed value, but an adjustable range. Within the scope, different FFU models and configurations can be evaluated. As project information is refined, the selection scope can be gradually narrowed.
How to confirm prototype
If the project scale is large or the requirements are high, you can select a prototype within the selection range for confirmation. Prototype testing can verify whether the air volume, static pressure, noise and installation conditions meet the requirements. After the prototype is confirmed, batch configuration will be determined.
Prototype confirmation can reduce the risk of adjustments after bulk purchase. For customized FFU, prototype confirmation is more important.
Issues that should be confirmed in advance during project communication
In the early stage of FFU selection, it is recommended to confirm the following with the manufacturer: protection area and airflow form; pollution load and cleanliness level; installation conditions and structural constraints; air volume estimation method; selection range and candidate configurations; prototype confirmation requirements; information requirements for subsequent detailed selection; and whether selection support is provided.
If you are sorting out the FFU early selection input, you can visitAili Industrial FFU fan filter unit to learn about the complete machine configuration, you can also contact Aili Industrial for selection support.
in conclusion
When the FFU air volume requirement has not yet been determined, the selection range can be sorted out based on the protection area, air flow form, pollution load, cleanliness level and installation conditions. The selection range is a variable interval, which is gradually narrowed as the information is refined. Mockup validation can help verify the configuration. You cannot just guess the air volume based on the size of the equipment and then directly purchase it in bulk.
Aili Industrial has complete production capabilities in terms of FFU complete machines and selection, and can coordinate the selection range with input from the early stage of the project. If you need to know more about the FFU selection method, you can visitAili Industrial FFU fan filter unit , you are also welcome to contact Aili Industrial for project support.
